<template>
<el-container id="container">
    <el-header style="width: 100%" height="120px">
        <Header :items="navItems" v-on:selected="changeSelected"></Header>
    </el-header>
    <el-main>
        <Body :items="bodyItems" :topic="navItems[currentTopicIndex].title"></Body>
    </el-main>
    <el-footer>
        <div id="footer">
            {{desc}}
        </div>
    </el-footer>
</el-container>
</template>
<script>
import Header from"./Header.vue";
import Body from "./Body.vue";
import FM from"../tools/FileManager";
export default {
    name: "Home",
    components:{
        Header,
        Body,
    },
    data(){
        return {
            navItems: FM.getAllTopic().map((item,ind)=>{
                return {
                    index:ind,
                    title:item
                }
            }),
            desc: "版权所有，仅限学习使用，禁止传播！",
            currentTopicIndex:0,
        };
    },
    methods:{
        changeSelected(index) {
            this.currentTopicIndex = index
        }
    },
    computed:{
        bodyItems() {
            return FM.getPosts(this.currentTopicIndex).map((item,ind)=>{
                return {
                    index:ind,
                    title:item
                }
            })
        }
    }
};
</script>

<style scoped>
#container{
    margin-left: 150px;
    margin-right: 150px;
    margin-top: 30px;
    height: 800px;
}
#footer{
    text-align: center;
    background-color: bisque;
    height: 40px;
    line-height: 40px;
    color: #717171;
}
</style>